OAKListView.LV_ITEM lvi = new OAKListView.LV_ITEM();
// Row of the item

lvi.iItem = 5; 
// Column of the item

lvi.iSubItem = 5;
lvi.pszText = "OAKListView-" + I.ToString();
//Here you pass the mask of the item. In this case 

//the mask is the both, Image and the text

lvi.mask = OAKListView.LVIF_IMAGE | OAKListView.LVIF_TEXT; 
// Image index on imagelist

lvi.iImage = 1;
// Sending a message to make the changes

OAKListView.SendMessage(listView1.Handle, 
         OAKListView.LVM_SETITEM, 0, ref lvi);